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From the "Activate Discount in Invoices", you can activate/deactivate Discount in the invoices. 

From the "Activate Taxes", you can activate/ deactivate taxes in the taxesinvoices. 

In App4Legal, Taxes and discounts can be added from the Money Settings. 

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Discounts can be added from the " Add new New Discount". It can be edited also. 

For more information about App4Legal, kindly reach out to us at help@app4legal.com.

Thank you!